Problem DNS - LAN

phil.davis · Apr 26, 2014, 10:46 AM

In the General Setup does not put any value in the DNS

If you have DHCP on WAN then check "Allow DNS server list to be overridden by DHCP/PPP on WAN" - then pfSense will get upstream DNS from the ISP DNS server/s.
If you have static IP on WAN, then put DNS server/s in the boxes in General Setup. Use the IP addresses of your ISP DNS servers, or some public DNS (Google, OpenDNS…) Then pfSense will get upstream DNS from these.
In all the above, the LAN clients will still get the pfSense LAN IP (DNS Forwarder)as their DNS server, which is what you want.

gio79 · Apr 28, 2014, 8:06 AM

Hello

I have a Static IP on the WAN, I set the DNS values in the General Setup page and I have not set any value in the boxes below (you can see in the picture)

Each client on the LAN has not set no value on relished ethernet card, if I go to Windows DOS I see that DHCP assigns an IP address and DNS as it gives me the address on the LAN to pfSense

But I can not navigate sites

Hello and thank you

johnpoz · Apr 28, 2014, 1:09 PM

Is the dns forwarder running? Can pfsense query dns using 8.8.8.8 ?

From diag, dns lookup

gio79 · Apr 28, 2014, 1:24 PM

Hello I have the DNS Forwarder active

I did the test with DNS LOOKUP and you can see the result in the image

I do not know what to do to run pfSense

Hello and thank you

johnpoz · Apr 28, 2014, 1:32 PM

Well from that way that looks, no dns forwarder is not running. Or does not know where to forward too. Or you have it not listening on the interfaces you need it to listen on, etc.
Since you got no response from 127.0.0.1 – notice mine got a response.

Post screen of dns forwarder page

gio79 · Apr 28, 2014, 1:56 PM

Hello thanks for the help but it does not work

On the DNS Forwarder I set the same values that you have set

On the General Setup what should I set?

I have to make the rules on the firewall?

Hello

johnpoz · Apr 28, 2014, 4:25 PM

Out of the box the default rules would be any any for the first lan interface.. If you add an OPT1 interface - say this 192.168.99 segment.. Then you would have to create rules on that interface to allow the traffic you want.

So in the attached you will see the firewall rules for my dmz segment. 192.168.3.0/24 in my case - this would be sim to your 192.168.99 segment

In my rules I allow traffic from the dmz segment to talk to my ntp server on my lan segment 192.168.1.0/24.. I allow traffic to my pfsense interface in that segment - in my case 192.168.3.253 for dns. And I allow traffic not going to the local networks, ie my lan and wlan segments..

What are you firewall rules on your segment? And validate that pfsense is listening on that interfaces IP for dns forwarding. Simple netstat should show it.

[2.1.2-RELEASE][root@pfsense.local.lan]/root(3): netstat -an | grep .53
tcp6 0 0 *.53 . LISTEN
tcp4 0 0 *.53 . LISTEN
udp6 0 0 *.53 .
udp4 0 0 *.53 .

So you can see *.53 here this means its listening on ALL IPs that pfsense has..

So you can see a computer on that network can query pfsense for dns - which in turn goes and asks the dns server setup on it.

sali147 · Apr 30, 2014, 7:32 AM

hello guys
I have problem with DNS, I have DHCP server on pfsense and my domain users can obtain from it,I have configured DNS server on DC also Microsoft Radius server for captive portal and DNS forwarder configured on pf,but now users when enter URL (e.g www.google.com) dns problem occur ,but when they enter 8.8.8.8 in Address Bar it opens the captive portal logon page and after authentication it brings the page.
any suggestion?

gio79 · Apr 30, 2014, 9:42 AM

Hello johnpoz

I tried to run the command
netstat-an | grep .53

but with the keyboard that I can not seem to do |

I do not know how to fix this DNS?

I did the command NSLOOKUP from a client on the LAN and I have results similar to yours except that there 's IP address of my pfSense

help help

johnpoz · Apr 30, 2014, 10:51 AM

If you did a nslookup and get the results like mine - then your dns is working..

So what exactly do you think is not working? And what kind of keyboard does not do | – normal keyboard it would same key as \ above your enter/return key -- and you don't really need to do that part - thats just so you don't get a full listing.. You could do just netstat -an

You know you could of just copied and pasted my command, etc. Did you fall off the turnip truck yesterday?

gio79 · Apr 30, 2014, 11:12 AM

Hello I decided to reset the machine pfSense and start from scratch to figure out where the problem is

johnpoz · Apr 30, 2014, 11:43 AM

So that was 30 minutes ago.. You should be up and running already, it takes all of like 5 minutes to get pfsense up and running from scratch.. Unless your dicking with something - the default settings would have you up and running with dns, dhcp bing bang zoom.

gio79 · Apr 30, 2014, 1:03 PM

Hello I have noticed one thing on my LAN, excluding pfSense I have this situation:

If I put a PC in DHCP and DNS worthless router assigns me an IP address because the DHCP is enabled on the router and DNS as I 212 216 112 112 who are my ISP's DNS, and in this situation I go on the internet no problem
If I put a pc and I go to set the IP address without DNS but I do not surf on the internet

Now I'm redoing the pfSense machine and reboot from scratch and slowly we see that the problems I

johnpoz · Apr 30, 2014, 1:09 PM

"- If I put a pc and I go to set the IP address without DNS but I do not surf on the internet"

How exactly do you think you can surf the internet without dns?? So duh!! if you don't set dns internet wouldn't work.

gio79 · May 2, 2014, 10:48 AM

Hello

I installed pfSense from scratch and I saw that there was a mistake when I went to set the LAN card on pfSense, in fact, put the Gateway, and it would not let me run anything …. in fact if I went on Status - Gateway I Gateway is the the WAN to the LAN, the LAN I deleted that everything works now via DNS Forwarder can block facebook

Hello and thanks to all